SANZENBACHER -F-

Oil // district 13 // lease#10435

op: WILLOWBEND INVESTMENTS, INC.

cum_oil

348k BBL

cum_gas

0 MCF

wells

5

production

1993-01 — 2026-03

peak_month

1993-01

-- production_history

cum_oil: 347,923 BBL cum_gas: 0 MCF

-- decline_curve_analysis

qi

3,388 BBL/mo

Di (annual)

46.6%

b-factor

0.7

EUR

204,981 BBL

R-squared

0.418

type

hyperbolic

-- wells (5)

WELL#APIOPERATORPERMITSDEPTHLAST_ISSUED
1RWILLOWBEND INVESTMENTS, INC.16,1002023-09-13
7BURNS PETROLEUM16,1001984-02-29
142-077-01820--------
242-077-01819--------
342-077-81271--------
EOF // data source: Texas Railroad Commission // 2026